Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e1071e97436b62e…

MALICIOUS

PDF

38.5 KB Created: 2020-08-06 13:34:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6803ef8745ac86a572219385291540f0 SHA-1: 886c3eaadc560c837a220c282c1f49edffc5dae2 SHA-256: 8e1071e97436b62e98f62412b52d7d05c9c6d199bcca96f839b909cb0e9ffb44
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious due to the presence of numerous embedded links, a technique often used for SEO manipulation or to distribute malicious content. One of the embedded URLs, 'https://ttraff.com/pify?keyword=metal+carbonyls+nptel+pdf', is flagged as a known malicious redirector. The document body contains garbled text and metadata indicating it was generated by wkhtmltopdf, suggesting it's not a legitimate document but rather a container for malicious links.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=metal+carbonyls+nptel+pdf
    • http://files.zolectra.com/uploads/1/3/1/4/131437147/6217375.pdf
    • http://files.tzaddi.net/uploads/1/3/0/7/130775970/jewozerigapu-mabekoziku-dukug.pdf
    • http://wosum.shadowridgewrestling.com/uploads/1/3/2/6/132695569/loxumatonabuki-gurokibudosid-dukeji-didev.pdf
    • http://files.bestzest.co.uk/uploads/1/3/1/6/131636984/4d14c.pdf
    • https://cdn.shopify.com/s/files/1/0431/9707/1524/files/41677823131.pdf
    • https://cdn.shopify.com/s/files/1/0439/7917/8142/files/nighthawk_r7000_dd-_wrt.pdf
    • https://cdn.shopify.com/s/files/1/0432/2449/8343/files/dms._vizio._vom_link.pdf
    • https://cdn.shopify.com/s/files/1/0435/5211/2803/files/73586608621.pdf
    • https://cdn.shopify.com/s/files/1/0438/8775/5432/files/halo_product_key.pdf
    • https://cdn.shopify.com/s/files/1/0431/5811/0363/files/dessert_darwin_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/8761/8463/files/english_vocabulary_test.pdf
    • https://cdn.shopify.com/s/files/1/0431/1102/2756/files/80695192770.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/80278007767.pdf
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/givobetaseburim.pdf
    • https://cdn.shopify.com/s/files/1/0432/2010/7424/files/tagevakoxigiwofefete.pdf
    • https://cdn.shopify.com/s/files/1/0430/8077/7882/files/vekebane.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000593d.bin
53cdf46aa52ed37c3615e600b5bd7e0022340107881d380cd316b0d8fdf5b8f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x593D 5396 bytes
font_01_sfnt_off00006bb3.bin
a6be2da7b5a667ea68b31a260d1c7284d54ee597dcc7965cd258677c004c6fe1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB3 9896 bytes

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